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Abstract: We exactly evaluate the entanglement of a six vertex and a nine vertex graphstates which correspond to non -two-colorable- graphs. The upper bound ofentanglement for five vertices ring graph state is improved to 2.9275, lessthan upper bound determined by LOCC. An upper bound of entanglement is proposedbased on the definition of graph state.



Autor: Xiao-yu Chen, Li-zhen Jiang

Fuente: https://arxiv.org/







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